Saw-mill dog



I (No ModeL) N. J. UUSHMAN.

SAW MILL DOG,

Patented Apr.'20, 1886.

WITNES INVENTOR ATTORNEYS.

NITED STATES NATHANIEL J. CUSHMAN, OF NORTH PARIS, MAINE.

SAW-MILL DOG.

SPECIFICATION forming part of Letters Patent No. 340,491, dated April20, 1886.

Application filed Fehruary'3, 1886. Serial No. 190,723. (No model.)

To all. whom it may concern.-

Be it known that I, NATHANIEL JoHNsoN CUSHMAN, of North Paris, in thecounty of Oxford and State of Maine, have invented a new andusefulImprovement in Frost-Dogs, of which the following is a specification,reference being bad to the annexed drawings, forming a part thereof, inwhich- Figure 1 is a side elevation of my improved frostdog. Fig. 2 is afront elevation. Fig. 3 is an inverted plan View of the arm of the dog.Fig. 4 is a plan view of the standard.

Similar letters of reference indicate corresponding parts in thedifferent figures of the drawings.

The object of my invention is to provide for the carriages of saw-millsa dog for clamping green frozen logs upon the saw-mill carriage whilebeing sawed into boards, plank, orjoists.

My invention consists in the construction and arrangement of parts, aswill be hereinafter fully described and claimed.

The base A,which is designed to be secured to the log-beam of a saw-millcarriage, sup ports two vertical round standards, B O, which areparallel with each other, the standard B being shorter than the standard0. An arm, D, provided with three or more apertures, a, and havingaround the series of apertures a flange, b, is received upon thestandards B O, the standards B O entering two of the adjacent holes a,and serving to support the arm in a horizontal position while allowingit to move vertically, but-not laterally.

To the under surface of the arm D, at opposite ends, are secured steelpoints 0,which engage the lumber to be held in place by the frost-dog.For convenience in handling, opposite sides of the arm D are providedwith handles d, which project outward laterally beyond the edges of theflange b, and in opposite edges of the flange b are formed semicircularrecesses e, for receiving the end of the shorter standard, B, when thearm is raised above the end of the standard 13 and turns through aquarter of a revolution, as shown in Fig. 2. By this means the arm D,when not in use, is prevented from turning or falling by the engagementof the shorter standard, B.

The length of the arm D may be adjusted with reference to the lumbercarried by the mill-carriage by shifting the standards B O in the holesa, or by reversing'the arm on the longer standard, 0.

One or more of these dogs maybe employed upon a single mill-carriage,and when allowed to rest by their own gravity with their points 0entering the lumber on the carriage the lumber will be held firmly whilebeing edged or slit up into strips.

Having thus described my invention, what I claim as new, and desire tosecure'by Letters Patent, is-

1. The combination, with the base-plate A and standards B O, ofdifferent lengths, of the arm D, provided with the points 0, havingapertures a, for receiving the standards B O, and provided with recessese, for engagement with the end of the shorter standard, B, substantiallyas herein shown and described.

2. The combination, in a saw-mill dog, with the base having the verticalstandards, of the transverse arm having a greater number of verticalapertures than there are standards, through which apertures thestandards may pass to allow the arm to be adjusted, and logengagingteeth depending from opposite ends of the said arm, substantially as setforth.

NATHANIEL J. OUSHMAN.

Witnesses:

JOHN F. STANLEY, MARY I. MELLEN.

